# 操作系统
# import os

# 环境变量
# ENV=production python ./oper_system.py
# print(os.environ['ENV'])

# path

from os import path

# 拼接path
distPath = path.join('..', 'io')

# 绝对路径
print(path.abspath(distPath))
# 拆分路径
print(path.split(path.abspath(distPath)))